Method for manufacturing pressure-sensitive adhesive film
The present application relates to a method for manufacturing a pressure-sensitive adhesive film. In an embodiment, a method for manufacturing a pressure-sensitive adhesive film having a pressure-sensitive adhesive layer and a base layer includes applying a pressure-sensitive adhesive composition on at least one side of a base layer, where the pressure-sensitive adhesive composition comprises an isocyanate compound, a metal compound and an acrylic polymer; and drying the pressure-sensitive adhesive composition at a temperature of 100° C. or higher to form a pressure-sensitive adhesive layer on the base layer.
1. A method for manufacturing a pressure-sensitive adhesive film, the pressure-sensitive adhesive film having a pressure-sensitive adhesive layer and a base layer, the method comprising:
applying a pressure-sensitive adhesive composition to at least one side of a base layer, wherein the pressure-sensitive adhesive composition comprises an isocyanate compound, a metal compound, and an acrylic polymer; and
drying the pressure-sensitive adhesive composition at a temperature of 110° C. to 130° C. to form a pressure-sensitive adhesive layer on the base layer,
wherein the metal compound comprises at least one metal of iron (Fe), zinc (Zn), zirconium (Zr), and a ligand that is diketonate,
wherein craters are present in the pressure-sensitive adhesive layer at a number of 5/m 2 or less,
wherein the craters have a diameter of 500 μm or less and a depth of 7 μm or less, and
wherein a color index of the pressure-sensitive adhesive layer ranges from 0.35 to 0.49.
2. The method for manufacturing a pressure-sensitive adhesive film according to claim 1 , wherein the metal compound comprises an iron (Fe) metal and a diketonate ligand.
3. The method for manufacturing a pressure-sensitive adhesive film according to claim 1 , wherein the acrylic polymer comprises a (meth)acrylate monomer having a hydroxy group as a polymerized unit.
4. The method for manufacturing a pressure-sensitive adhesive film according to claim 1 , wherein the isocyanate compound is a bifunctional or multifunctional compound.
5. The method for manufacturing a pressure-sensitive adhesive film according to claim 1 , wherein the base layer comprises any one of a polyester film, a polytetrafluoroethylene film, a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a vinyl chloride copolymer film, or a polyimide film.
6. The method for manufacturing a pressure-sensitive adhesive film according to claim 1 , wherein the pressure-sensitive adhesive composition comprises 0.01 to 0.5 parts by weight of the metal compound and 1 to 20 parts by weight of the isocyanate compound, relative to 100 parts by weight of the acrylic polymer.
7. The method for manufacturing a pressure-sensitive adhesive film according to claim 1 , wherein the pressure-sensitive adhesive composition further comprises a curing retardant.
8. The method for manufacturing a pressure-sensitive adhesive film according to claim 7 , wherein the curing retardant is one or more of methyl acetoacetate, ethyl acetoacetate, octyl acetoacetate, oleyl acetoacetate, lauryl acetoacetate, stearyl acetoacetate, acetylacetone, 2,4-hexanedione or benzoylacetone.
9. The method for manufacturing a pressure-sensitive adhesive film according to claim 1 , further comprising:
laminating a release film on the pressure-sensitive adhesive layer after the drying step.
10. The method for manufacturing a pressure-sensitive adhesive film according to claim 9 , further comprising:
curing, after the lamination of the release film, at a temperature range of 30° C. to 60° C.
11. An optical laminate, comprising:
an optical film; and
a pressure-sensitive adhesive film, which is manufactured according to the method of claim 1 , formed on one side or both sides of the optical film,
wherein the pressure-sensitive adhesive film comprises a pressure-sensitive adhesive layer and a base layer,
wherein craters are present in the pressure-sensitive adhesive layer at a number of 5/m 2 or less,
wherein the craters have a diameter of 500 μm or less and a depth of 7μm or less, and
wherein a color index of the pressure-sensitive adhesive layer ranges from 0.35 to 0.49,
wherein the method comprises:
applying a pressure-sensitive adhesive composition to at least one side of the base layer, wherein the pressure-sensitive adhesive composition comprises an isocyanate compound, a metal compound, and an acrylic polymer; and
drying the pressure-sensitive adhesive composition at a temperature of 110° C. to 130° C. to form the pressure-sensitive adhesive layer on the base layer,
wherein the metal compound comprises at least one metal of iron (Fe), zinc (Zn), zirconium (Zr), and a ligand that is diketonate.